Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 416 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a paper clip (c) a balloon (d) warm water
2. 2.True or false: a balloon is needed for the turmeric test. (a) False (b) True
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) seeds on dry cotton (c) wet seeds by a window (d) wet seeds in the dark
5. 5.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) cooking an egg (d) freezing water
7. 7.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) ignore it (c) rinse with clean water (d) rub it hard
8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) white paper strips (d) lemon juice
9. 9.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a tray for spills (c) a magnet (d) a comb
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.True or false: a magnet is not needed for the leafy bag test. (a) True (b) False
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) how hard we shake (b) the same jar (c) time to make butter (d) the cream temperature
13. 13.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) wet or dry cotton (c) the same place
14. 14.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) with a hot glue gun (c) as tight as possible (d) with sharp wire
15. 15.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) baking soda water (d) lemon juice
16. 16.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) nothing (c) the salt (d) the mud
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
18. 18.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) True (b) False
20. 20.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
21. 21.True or false: seeds on dry cotton sprouts in a few days. (a) True (b) False
22. 22.True or false: bran from wheat flour is done by sieving. (a) False (b) True
23. 23.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
24. 24.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
26. 26.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it gets wet (c) it can block breathing (d) it changes colour
27. 27.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds in the freezer (c) wet seeds by a window (d) seeds on dry cotton
28. 28.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they have no soil (c) they are too wet (d) they have no water
29. 29.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) sand and pebbles (c) yeast (d) muddy water
30. 30.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is kept the same. (a) True (b) False
31. 31.True or false: fresh cream is needed for making butter. (a) True (b) False
32. 32.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) clear water only (c) sugar crystals (d) lumps of butter
33. 33.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
35. 35.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
36. 36.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) white paper strips (c) turmeric powder (d) water
37. 37.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it turns yellow (c) so air gets out (d) so it gets hot
38. 38.True or false: letting the paper dry is a job a child can do. (a) True (b) False
39. 39.True or false: yeast is needed for the secret lemon message. (a) True (b) False
40. 40.True or false: cotton wool is not needed for sprouting seeds. (a) False (b) True

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